Section II Free-Response Essay Questions

Periodic table, a table of standard reduction potentials, and a table containing various equations and constants are provided. 

Part A 40 minutes calculator allowed (no qwerty keyboards). Any programmable or graphing calculator may be used, and you will not be required to erase the calculator memories before or after the examination. Questions require mathematical computations. It is essential that you show all steps in solving mathematical problems because partial credit is awarded for each problem that shows how the answer was obtained. 

Question 2 or 3 (Choose either one) 20% Only one of these problems will be scored. If you start both problems, be sure to cross out the one you do not want scored. Both questions require mathematical computations. 

Part B 50 minutes calculator not allowed. Questions do not require mathematical computations. 

Question 4 (Required) 15% Write the formulas to show the reactants and the products for any five of eight chemical reactions. Each of the reactions occurs in aqueous solution unless otherwise indicated. Represent snbstances in solution as ions if the substance is extensively ionized. Omit formulas for any ions or molecules that are unchanged by the reaction. In all cases a reaction occurs. You need not balance the equations. 

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The free-response essay questions that make up Section II go through a similar process of creation, modification, pre-testing, and final refinement, so that the questions cover the necessary areas of material and are at an appropriate level of difficulty and clarity. The committee also makes a great effort to construct a free-response exam that will allow for clear and equitable grading by the AP readers. 

No attempt is made here to combine your specific results on the practice AP chemistry free-response questions (Section II) with your multiple-choice results (which is beyond the scope of this book). However, you should have your AP chemistry instructor review your essays before you take the AP exam so that he or she can give you additional pointers. 

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